Display shows E19 and the refrigerator may not lock or unlock the control panel or child lock properly.

Safety: Unplug the refrigerator before removing the control panel.

Steps:

• Clean the panel: Wipe the touch panel gently with a soft, slightly damp cloth to remove any residue that might cause false touches. Dry thoroughly.
• Check for stuck buttons: Press each button individually to feel for sticking or lack of travel.
• Access the UI board: Remove the trim and screws to access the user interface PCB. Inspect for moisture, corrosion, or burnt components.
• Reseat connectors: Disconnect and reconnect the UI harness to ensure a solid connection.
• Replace UI board if needed: If E19 persists and buttons remain unresponsive or erratic, replace the Sharp-compatible UI control board.

If a new UI does not resolve E19, the main control board may be faulty and should be serviced by a professional.